Sir John Rhys, Celtic Folklore: Welsh and Manx…
“ Since the fairies are always represented as old-fashioned in their ways, it is quite possible that they were once regarded as talking a more ancient language of the country. Which was it? An early version of these legends might perhaps have supplied the answer, and told us that it was Gwyđelig or Goidelic, if not an earlier idiom, to wit that of the Aborigines before they learnt Goidelic from the Celts of the first wave of Aryan invasion, whether it was in the region of the Eifl or in the Demetian half of Keredigion. ”
